Triumph 060421 Thunderbit Black & Gold Screw Drill Bits 21/64"

Triumph 060421 Thunderbit Black & Gold Screw Drill Bits 21/64"

Thunderbit® drills have a special heavy-duty core that guarantess increased strength and reduced breakage. Unique spiral flute design improves chip ejection and coolant flow to the point. Screw machine length, 135 split point.

Product Features

• Unique spiral flute design improves chip ejection and coolant flow
• Heavy-duty core for increased strength and reduced breakage
• 135° self-centering split point to prevent walking
• Black and Gold surface treatment for added lubricity and higher drilling speeds
• Screw machine length for maximum rigidity
• NAS Type C
• Made in USA

Applications

• Drilling in hard alloy metals like stainless steel
• Drilling in sheet metal